21342044044 has 12 divisors (see below), whose sum is σ = 39314291800. Its totient is φ = 10109389248.

The previous prime is 21342044041. The next prime is 21342044083. The reversal of 21342044044 is 44044024312.

It is not an unprimeable number, because it can be changed into a prime (21342044041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140408109 + ... + 140408260.

Almost surely, 2^21342044044 is an apocalyptic number.

It is an amenable number.

21342044044 is a deficient number, since it is larger than the sum of its proper divisors (17972247756).

21342044044 is a wasteful number, since it uses less digits than its factorization.

21342044044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280816392 (or 280816390 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 21342044044 its reverse (44044024312), we get a palindrome (65386068356).

The spelling of 21342044044 in words is "twenty-one billion, three hundred forty-two million, forty-four thousand, forty-four".